OJ Board

Beware the spacing!
title/first name may be an empty string

Can anyone with AC program run the following input for me please? Thanks

5
NAULINS 3
HOUSTON US SHIP * UHDOWNTOWN
NAULINS US SHIP * UNO
DALLAS US AIR UT *
HOUSTON 4
HOUSTON US * UH UHDT
SANANTONIO US BUS UT UTSA
DALLAS US AIR UT *
NAULINS US SHIP * UNO
DALLAS 7
DALLAS US * UT UTD
DALLAS US * UT UTA ...

I got P.E. when my code is like
while (gets(str))
{
length = strlen(str);
if (length == 0) continue;

if (first == 1)
first = 0;
else
printf("\n");

.........
}

I got accepted without P.E. when I changed my code to
while (gets(str))
{
if (first == 1)
first = 0;
else
printf("\n ...